You didn't say what you are using the heroes for, so I assume it's for standard NM/HM/VQ etc. Mesway fits very well there (and don't worry about that necro, one of yours should be equivalent to that already). For added comfort and "cruise-control"-ness, you can add Spiritway in there too (then again, ignore the necro). The 8th slot is up to you - I often used a commandagon simply to have Fall Back! --- you'll be killing stuff so fast you'll be eager to get to the next mob!

If using a setup like this, my 8th depends mostly of the foes I'll face (i.e. hex/condition removal etc.) If you're going to use Spiritwayand want to bring Splinter Weapon on your channeling rit for extra domination extravaganza, then you can use your 8th hero to dish out that damage (a paragon with AR seems to work great for me).
I wouldn't worry about not having a melee hero in most cases - just make sure the minions aren't too far behind when engaging. Spirits are also good at distracting the enemy. Of course, harder areas need more preparation, but you should get by well enough. It's not a very original setup though, so don't be afraid to change it up a little and make it more fancy! No one's gonna see you if it fails horribly anyway
